/* ===== Case study template =====
   Opt in with <body class="case-study">. Tokens and base type come from editorial.css.
   Editorial look: warm paper background, serif display headings,
   mono uppercase labels, hairline dividers instead of boxed cards.
   Motion lives in js/case-study.js and is disabled for reduced-motion users.
*/
body.case-study {
	background-color: var(--cs-bg);
	color: var(--cs-body);
	font-family: var(--cs-sans);
}

/* ---------- Reading progress ---------- */
.cs-progress {
	position: fixed;
	inset: 0 0 auto 0;
	height: 2px;
	z-index: 1100;
	background: var(--cs-ink);
	transform: scaleX(0);
	transform-origin: 0 50%;
	pointer-events: none;
}

/* ---------- Type ---------- */
.case-study h1,
.case-study h2,
.case-study .cs-quote {
	font-family: var(--cs-serif);
	font-weight: 400;
	color: var(--cs-ink);
}

.cs-title {
	font-size: clamp(2.25rem, 5.2vw, 4rem);
	line-height: 1.04;
	letter-spacing: -0.025em;
	max-width: 16ch;
	margin-bottom: 1.25rem;
}

.cs-lede {
	font-size: clamp(1.1rem, 1.6vw, 1.3rem);
	line-height: 1.5;
	color: var(--cs-muted);
	max-width: 34em;
	margin-bottom: 1.75rem;
}

.case-study h2 {
	font-size: clamp(1.7rem, 3vw, 2.35rem);
	line-height: 1.12;
	letter-spacing: -0.02em;
	margin-bottom: 1.1rem;
	max-width: 22ch;
}

.case-study h3 {
	font-family: var(--cs-sans);
	font-size: 1rem;
	font-weight: 600;
	letter-spacing: 0;
	color: var(--cs-ink);
	margin-bottom: 0.35rem;
}

.case-study p,
.case-study li {
	line-height: 1.65;
}

.case-study strong {
	color: var(--cs-ink);
	font-weight: 600;
}

.case-study .cs-main a:not(.cs-btn) {
	color: var(--cs-ink);
	text-decoration: underline;
	text-decoration-color: var(--cs-line);
	text-underline-offset: 3px;
	transition: text-decoration-color 0.2s ease;
}

.case-study .cs-main a:not(.cs-btn):hover {
	text-decoration-color: var(--cs-ink);
}

.cs-eyebrow {
	font-family: var(--cs-mono);
	font-size: 0.72rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.9rem;
}

.cs-eyebrow .cs-num {
	color: var(--cs-ink);
	margin-right: 0.6em;
}

.cs-tldr {
	font-size: 1.12rem;
	line-height: 1.6;
	color: var(--cs-ink);
}

/* ---------- Badges and buttons ---------- */
.cs-badges {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem;
}

.cs-badge {
	display: inline-flex;
	align-items: center;
	gap: 0.4em;
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	line-height: 1;
	white-space: nowrap;
	color: var(--cs-muted);
	border: 1px solid var(--cs-line);
	border-radius: 3px;
	padding: 0.38em 0.6em;
}

.cs-badge--solid { color: var(--cs-ink); border-color: var(--cs-ink); }

.cs-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.6rem;
}

.cs-btn {
	display: inline-flex;
	align-items: center;
	gap: 0.5em;
	font-family: var(--cs-sans);
	font-size: 0.95rem;
	font-weight: 500;
	text-decoration: none;
	color: var(--cs-bg);
	background: var(--cs-ink);
	border: 1px solid var(--cs-ink);
	border-radius: 4px;
	padding: 0.6rem 1.1rem;
	transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.cs-btn i {
	font-size: 0.75em;
	transition: transform 0.2s ease;
}

.cs-btn:hover {
	color: var(--cs-bg);
	transform: translateY(-1px);
}

.cs-btn:hover i {
	transform: translate(2px, -2px);
}

.cs-btn--ghost {
	color: var(--cs-ink);
	background: transparent;
	border-color: var(--cs-line);
}

.cs-btn--ghost:hover {
	color: var(--cs-ink);
	border-color: var(--cs-ink);
}

.cs-btn:focus-visible,
.cs-toc a:focus-visible,
.cs-share a:focus-visible {
	outline: 2px solid var(--cs-accent);
	outline-offset: 2px;
}

/* ---------- Hero ---------- */
.cs-hero {
	padding: 3.5rem 0 0;
}

.cs-hero .cs-badges {
	margin-top: 1.5rem;
}

.cs-meta {
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	margin: 2.5rem 0 0;
	border-top: 1px solid var(--cs-line);
}

.cs-meta > div {
	padding: 0.9rem 1rem 0.9rem 0;
}

.cs-meta dt {
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.25rem;
}

.cs-meta dd {
	margin: 0;
	font-size: 0.95rem;
	color: var(--cs-ink);
}

/* ---------- Figures ---------- */
.cs-figure {
	margin: 1.75rem 0;
}

.cs-figure img,
.cs-figure video {
	height: auto;
}

.cs-figure img,
.cs-figure video,
.cs-figure .ratio {
	display: block;
	width: 100%;
	border: 1px solid var(--cs-line);
	border-radius: 6px;
	background: #0b0c10;
}

.cs-figure .ratio {
	overflow: hidden;
}

.cs-figure .cs-pixel {
	image-rendering: pixelated;
}

.cs-figure figcaption {
	display: flex;
	gap: 0.9em;
	margin-top: 0.6rem;
	font-size: 0.85rem;
	line-height: 1.5;
	color: var(--cs-muted);
}

.cs-figure figcaption .cs-fig {
	flex: none;
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-ink);
	padding-top: 0.28em;
}

.cs-hero .cs-figure {
	margin: 1.5rem 0 0;
}

/* ---------- Stats strip ---------- */
.cs-stats {
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	margin: 2.5rem 0 0;
	border-top: 1px solid var(--cs-line);
	border-bottom: 1px solid var(--cs-line);
}

.cs-stat {
	padding: 1.4rem 1.25rem 1.3rem 0;
}

.cs-stat + .cs-stat {
	padding-left: 1.25rem;
	border-left: 1px solid var(--cs-line);
}

.cs-stat-value {
	font-family: var(--cs-serif);
	font-size: clamp(2rem, 4vw, 3rem);
	line-height: 1;
	letter-spacing: -0.02em;
	color: var(--cs-ink);
	font-variant-numeric: tabular-nums;
}

.cs-stat-value small {
	font-size: 0.45em;
	letter-spacing: 0;
	color: var(--cs-muted);
	margin-left: 0.15em;
}

.cs-stat-label {
	margin-top: 0.5rem;
	font-size: 0.85rem;
	line-height: 1.4;
	color: var(--cs-muted);
}

/* ---------- Body layout: content + sticky rail ---------- */
.cs-layout {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 3rem;
}

.cs-rail {
	display: none;
}

/* The rail is filled in by js/case-study.js; without JS it stays out of the way */
.cs-rail:empty {
	display: none !important;
}

@media (min-width: 1100px) {
	.cs-layout {
		grid-template-columns: minmax(0, 740px) 210px;
		justify-content: space-between;
	}

	.cs-rail {
		display: block;
		padding-top: 4.5rem;
	}

	.cs-rail-inner {
		position: sticky;
		top: 96px;
	}
}

/* Floating variant: for pages built from full-width section bands, where the
   rail can't sit in a grid column. It lives in the right-hand page margin. */
.cs-rail--float {
	display: none;
}

@media (min-width: 1100px) {
	.cs-rail--float {
		display: block;
		position: fixed;
		top: 50%;
		right: 14px;
		z-index: 1000;
		width: 190px;
		padding: 0;
		transform: translateY(-50%);
		transition: opacity 0.25s ease, visibility 0.25s ease;
	}

	.cs-rail--float .cs-toc {
		margin-bottom: 0;
	}

	.cs-rail--float.is-hidden {
		opacity: 0;
		visibility: hidden;
		pointer-events: none;
	}
}

/* Not enough margin for labels: collapse to tick marks, expand on hover/focus */
@media (min-width: 1100px) and (max-width: 1439.98px) {
	.cs-rail--float {
		width: auto;
		padding: 0.75rem 0.5rem 0.75rem 0.75rem;
		border-radius: var(--cs-radius);
		transition: background-color 0.2s ease, box-shadow 0.2s ease;
	}

	.cs-rail--float .cs-rail-label {
		display: none;
	}

	.cs-rail--float .cs-toc {
		border-left: none;
	}

	.cs-rail--float .cs-toc a {
		display: flex;
		align-items: center;
		justify-content: flex-end;
		gap: 0.6rem;
		margin: 0;
		padding: 0.3rem 0;
		border: none;
		max-width: 22px;
		overflow: hidden;
		white-space: nowrap;
		font-size: 0.8rem;
		color: transparent;
		transition: max-width 0.25s ease, color 0.2s ease;
	}

	.cs-rail--float .cs-toc a::after {
		content: "";
		flex: none;
		width: 12px;
		height: 1px;
		background: var(--cs-muted);
		transition: width 0.2s ease, background-color 0.2s ease;
	}

	.cs-rail--float .cs-toc a.is-active {
		padding-left: 0;
	}

	.cs-rail--float .cs-toc a.is-active::after {
		width: 22px;
		height: 2px;
		background: var(--cs-ink);
	}

	.cs-rail--float:hover,
	.cs-rail--float:focus-within {
		background: var(--cs-raised);
		box-shadow: 0 0 0 1px var(--cs-line);
	}

	.cs-rail--float:hover .cs-toc a,
	.cs-rail--float:focus-within .cs-toc a {
		max-width: 240px;
		color: var(--cs-muted);
	}

	.cs-rail--float:hover .cs-toc a.is-active,
	.cs-rail--float:hover .cs-toc a:hover,
	.cs-rail--float:focus-within .cs-toc a.is-active {
		color: var(--cs-ink);
	}
}

@media (min-width: 1440px) {
	.cs-rail--float {
		right: max(14px, calc((100vw - 1000px) / 2 - 215px));
	}
}

.cs-section {
	padding: 4.5rem 0 0;
	scroll-margin-top: 40px;
}

.cs-section > :last-child {
	margin-bottom: 0;
}

.cs-main > .cs-section:last-child {
	padding-bottom: 5rem;
}

/* ---------- Rail: contents + share ---------- */
.cs-rail-label {
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.75rem;
}

.cs-toc {
	list-style: none;
	margin: 0 0 2rem;
	padding: 0;
	border-left: 1px solid var(--cs-line);
}

.cs-toc a {
	display: block;
	margin-left: -1px;
	padding: 0.3rem 0 0.3rem 0.9rem;
	border-left: 1px solid transparent;
	font-size: 0.86rem;
	line-height: 1.35;
	color: var(--cs-muted);
	text-decoration: none;
	transition: color 0.2s ease, border-color 0.2s ease, padding-left 0.2s ease;
}

.cs-toc a:hover {
	color: var(--cs-ink);
}

.cs-toc a.is-active {
	color: var(--cs-ink);
	border-left-color: var(--cs-ink);
	padding-left: 1.15rem;
}

.cs-share {
	display: flex;
	gap: 0.4rem;
	margin-bottom: 1.5rem;
}

.cs-share a,
.cs-share button {
	flex: none;
	width: 34px;
	height: 34px;
	margin: 0;
	padding: 0;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	font-size: 0.8rem;
	color: var(--cs-muted);
	background: transparent;
	border: 1px solid var(--cs-line);
	border-radius: 4px;
	text-decoration: none;
	transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.cs-share a:hover,
.cs-share button:hover {
	color: var(--cs-ink);
	border-color: var(--cs-ink);
	transform: translateY(-1px);
}

.cs-byline {
	font-size: 0.82rem;
	line-height: 1.45;
	color: var(--cs-muted);
	margin: 0;
}

.cs-byline strong {
	display: block;
	font-weight: 600;
}

/* ---------- Definition rows (ownership, takeaways) ---------- */
.cs-rows {
	margin: 1.5rem 0;
	padding: 0;
	list-style: none;
	border-top: 1px solid var(--cs-line);
}

.cs-row {
	display: grid;
	grid-template-columns: 9.5rem minmax(0, 1fr);
	gap: 0.25rem 1.5rem;
	padding: 0.95rem 0;
	border-bottom: 1px solid var(--cs-line);
}

.cs-row-key {
	font-family: var(--cs-mono);
	font-size: 0.68rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-ink);
	padding-top: 0.35em;
}

.cs-row p {
	margin: 0;
}

/* ---------- Quote ---------- */
.cs-quote {
	margin: 2.25rem 0;
	padding: 0 0 0 1.25rem;
	border-left: 2px solid var(--cs-ink);
	font-size: clamp(1.35rem, 2.4vw, 1.75rem);
	font-style: italic;
	line-height: 1.3;
	letter-spacing: -0.01em;
}

.cs-quote cite {
	display: block;
	margin-top: 0.75rem;
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-style: normal;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
}

/* ---------- Two-up phases ---------- */
.cs-pair {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0 2rem;
	margin: 1.75rem 0;
	border-top: 1px solid var(--cs-line);
}

.cs-pair > div {
	padding: 1.1rem 0 0;
}

.cs-pair .cs-badge {
	margin-bottom: 0.75rem;
}

.cs-pair p {
	font-size: 0.95rem;
	margin: 0;
}

/* ---------- Journey (roles in a loop) ----------
   A framed board: one small UI vignette per step, joined by arrows,
   with a dashed bracket underneath closing the loop. */
.cs-journey-fig {
	margin: 2rem 0;
}

.cs-journey-board {
	padding: 1.5rem 1.5rem 1.25rem;
	background: var(--cs-surface);
	border: 1px solid var(--cs-line);
	border-radius: 6px;
}

.cs-journey {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0 1.75rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.cs-journey-step {
	position: relative;
	display: flex;
	flex-direction: column;
}

.cs-journey-scene {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	height: 10.5rem;
	margin-bottom: 1rem;
	padding: 0.85rem;
	background: var(--cs-bg);
	border: 1px solid var(--cs-line);
	border-radius: 4px;
}

/* Arrow across the gap to the next scene */
.cs-journey-step:not(:last-child) .cs-journey-scene::before,
.cs-journey-step:not(:last-child) .cs-journey-scene::after {
	content: "";
	position: absolute;
	top: 50%;
}

.cs-journey-step:not(:last-child) .cs-journey-scene::before {
	left: 100%;
	width: 1.75rem;
	margin-left: 1px;
	border-top: 1px solid var(--cs-ink);
}

.cs-journey-step:not(:last-child) .cs-journey-scene::after {
	left: calc(100% + 1.75rem - 8px);
	width: 7px;
	height: 7px;
	margin-top: -3px;
	border-top: 1px solid var(--cs-ink);
	border-right: 1px solid var(--cs-ink);
	transform: rotate(45deg);
}

/* Vignettes */
.cs-jv-card,
.cs-jv-page {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 0.4rem;
	width: 100%;
	padding: 0.6rem;
	background: var(--cs-raised);
	border: 1px solid var(--cs-line);
	border-radius: 2px;
}

.cs-jv-tex {
	align-self: stretch;
	height: 1.6rem;
	border: 1px solid var(--cs-line);
	background-image: radial-gradient(var(--cs-muted) 1px, transparent 1.2px);
	background-size: 7px 7px;
	background-position: 3px 3px;
}

.cs-jv-mono {
	font-family: var(--cs-mono);
	font-size: 0.5rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	line-height: 1.2;
	color: var(--cs-muted);
}

.cs-jv-title {
	font-family: var(--cs-serif);
	font-size: 0.95rem;
	line-height: 1.15;
	color: var(--cs-ink);
}

.cs-jv-btn {
	font-family: var(--cs-mono);
	font-size: 0.5rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	line-height: 1;
	color: var(--cs-ink);
	border: 1px solid var(--cs-ink);
	border-radius: 2px;
	padding: 0.4em 0.6em;
}

.cs-jv-btn--solid {
	background: var(--cs-ink);
	color: var(--cs-bg);
}

.cs-jv-chat {
	display: flex;
	flex-direction: column;
	gap: 0.45rem;
	width: 100%;
}

.cs-jv-bubble {
	align-self: flex-start;
	max-width: 88%;
	padding: 0.45rem 0.6rem;
	font-size: 0.7rem;
	line-height: 1.3;
	color: var(--cs-body);
	background: var(--cs-raised);
	border: 1px solid var(--cs-line);
	border-radius: 10px 10px 10px 2px;
}

.cs-jv-bubble--me {
	align-self: flex-end;
	color: var(--cs-bg);
	background: var(--cs-ink);
	border-color: var(--cs-ink);
	border-radius: 10px 10px 2px 10px;
}

.cs-jv-link {
	display: flex;
	align-items: center;
	gap: 0.5em;
	margin-top: 0.4rem;
	padding: 0.4rem 0.5rem;
	font-family: var(--cs-mono);
	font-size: 0.55rem;
	letter-spacing: 0.04em;
	color: var(--cs-ink);
	background: var(--cs-bg);
	border-radius: 4px;
}

.cs-jv-bar {
	display: flex;
	align-items: center;
	gap: 3px;
	align-self: stretch;
	margin: -0.6rem -0.6rem 0.2rem;
	padding: 0.35rem 0.5rem;
	border-bottom: 1px solid var(--cs-line);
}

.cs-jv-bar i {
	width: 4px;
	height: 4px;
	border-radius: 50%;
	background: var(--cs-line);
}

.cs-jv-bar b {
	margin-left: 0.4rem;
	font-family: var(--cs-mono);
	font-size: 0.5rem;
	font-weight: 400;
	letter-spacing: 0.04em;
	color: var(--cs-muted);
}

.cs-jv-lines {
	align-self: stretch;
	height: 0.7rem;
	border-top: 2px solid var(--cs-line);
	border-bottom: 2px solid var(--cs-line);
	margin-right: 25%;
}

/* Step text */
.cs-journey-act {
	font-family: var(--cs-mono);
	font-size: 0.68rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.5rem;
}

.cs-journey-act .cs-num {
	color: var(--cs-ink);
	margin-right: 0.6em;
}

.cs-journey-step p {
	font-size: 0.9rem;
	line-height: 1.5;
	margin: 0;
}

.cs-journey-step .cs-journey-needs {
	margin-top: auto;
	padding-top: 0.9rem;
	color: var(--cs-ink);
	font-weight: 600;
	line-height: 1.4;
}

.cs-journey-needs span {
	display: block;
	font-family: var(--cs-mono);
	font-size: 0.62rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.3rem;
}

/* Dashed bracket from the last step back to the first */
.case-study .cs-journey-loop {
	position: relative;
	margin: 1rem 0 0;
	padding-top: 1.5rem;
	font-size: 0.85rem;
	line-height: 1.4;
	text-align: center;
	color: var(--cs-ink);
}

.cs-journey-loop::before {
	content: "";
	position: absolute;
	top: 0;
	left: 16.666%;
	right: 16.666%;
	height: 1.5rem;
	border: 1px dashed var(--cs-muted);
	border-top: 0;
	border-radius: 0 0 6px 6px;
}

.cs-journey-loop::after {
	content: "";
	position: absolute;
	top: 1px;
	left: 16.666%;
	width: 7px;
	height: 7px;
	margin-left: -3px;
	border-top: 1px solid var(--cs-ink);
	border-left: 1px solid var(--cs-ink);
	transform: rotate(45deg);
}

.cs-journey-loop span {
	position: relative;
	z-index: 1;
	display: inline-block;
	padding: 0 0.75rem;
	background: var(--cs-surface);
	transform: translateY(50%);
}

.cs-journey-loop i {
	margin-right: 0.6em;
	font-size: 0.8em;
	color: var(--cs-muted);
}

@media (max-width: 767.98px) {
	.cs-journey-board {
		padding: 1rem;
	}

	.cs-journey {
		grid-template-columns: minmax(0, 1fr);
		gap: 2.25rem 0;
	}

	.cs-journey-scene {
		height: auto;
		padding: 1rem 15%;
	}

	/* Arrows run down the page between steps instead */
	.cs-journey-step:not(:last-child) .cs-journey-scene::before,
	.cs-journey-step:not(:last-child) .cs-journey-scene::after {
		content: none;
	}

	.cs-journey-step:not(:last-child)::before,
	.cs-journey-step:not(:last-child)::after {
		content: "";
		position: absolute;
		left: 50%;
	}

	.cs-journey-step:not(:last-child)::before {
		bottom: -1.75rem;
		height: 1.25rem;
		border-left: 1px solid var(--cs-ink);
	}

	.cs-journey-step:not(:last-child)::after {
		bottom: -1.75rem;
		width: 7px;
		height: 7px;
		margin-left: -3px;
		border-right: 1px solid var(--cs-ink);
		border-bottom: 1px solid var(--cs-ink);
		transform: rotate(45deg);
	}

	.case-study .cs-journey-loop {
		margin-top: 1.25rem;
		padding-top: 1rem;
		border-top: 1px dashed var(--cs-muted);
		text-align: left;
	}

	.cs-journey-loop::before,
	.cs-journey-loop::after {
		content: none;
	}

	.cs-journey-loop span {
		padding: 0;
		transform: none;
	}
}

/* ---------- Tier list ---------- */
.cs-tiers {
	margin: 1.5rem 0 0;
	padding: 0;
	list-style: none;
	border-top: 1px solid var(--cs-line);
}

.cs-tier {
	display: grid;
	grid-template-columns: 6.5rem minmax(0, 1fr) auto;
	gap: 0.25rem 1.25rem;
	align-items: baseline;
	padding: 1rem 0;
	border-bottom: 1px solid var(--cs-line);
	transition: padding-left 0.25s ease;
}

.cs-tier:hover {
	padding-left: 0.4rem;
}

.cs-tier p {
	grid-column: 2 / -1;
	margin: 0;
	font-size: 0.93rem;
	color: var(--cs-muted);
}

.cs-tier h3 {
	margin: 0;
}

.cs-tier-effort {
	font-family: var(--cs-mono);
	font-size: 0.7rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--cs-muted);
	white-space: nowrap;
}

/* ---------- Before / after table ---------- */
.cs-ba {
	margin: 1.5rem 0 0;
	border-top: 1px solid var(--cs-ink);
}

.cs-ba-head,
.cs-ba-row {
	display: grid;
	grid-template-columns: 11rem minmax(0, 1fr) minmax(0, 1fr);
	gap: 0.5rem 1.5rem;
}

.cs-ba-head {
	padding: 0.6rem 0;
	border-bottom: 1px solid var(--cs-line);
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
}

.cs-ba-row {
	padding: 1.1rem 0;
	border-bottom: 1px solid var(--cs-line);
	font-size: 0.93rem;
}

.cs-ba-row h3 {
	margin: 0;
	font-size: 0.95rem;
}

.cs-ba-row h3 i {
	width: 1.4em;
	font-size: 0.85em;
	color: var(--cs-muted);
}

.cs-ba-row p {
	margin: 0;
	line-height: 1.55;
}

.cs-ba-before {
	color: var(--cs-muted);
}

.cs-ba-row [data-label]::before {
	display: none;
	content: attr(data-label);
	font-family: var(--cs-mono);
	font-size: 0.62rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.15rem;
}

/* ---------- Plain and cut lists ---------- */
.cs-list {
	margin: 1.25rem 0;
	padding: 0;
	list-style: none;
}

.cs-list li {
	position: relative;
	padding: 0 0 0.75rem 1.4rem;
}

.cs-list li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.72em;
	width: 0.6rem;
	height: 1px;
	background: var(--cs-muted);
}

.cs-list--cut li::before {
	content: "\00d7";
	top: 0;
	width: auto;
	height: auto;
	background: none;
	font-family: var(--cs-mono);
	color: var(--cs-cut);
}

/* ---------- Accordion (extends .case-details from custom.css) ---------- */
.case-study .case-details {
	border-color: var(--cs-line);
}

.case-study .case-details > summary {
	font-family: var(--cs-mono);
	font-size: 0.72rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--cs-ink);
	padding: 0.95rem 0;
	transition: padding-left 0.2s ease;
}

.case-study .case-details > summary:hover {
	color: var(--cs-ink);
	padding-left: 0.3rem;
}

.case-study .case-details > summary::after {
	font-family: var(--cs-mono);
	font-size: 1rem;
	color: var(--cs-muted);
}

.case-study .case-details[open] > .case-details-body {
	animation: cs-open 0.35s ease both;
}

@keyframes cs-open {
	from { opacity: 0; transform: translateY(-6px); }
	to   { opacity: 1; transform: none; }
}

/* ---------- Step flow (replaces flow-diagram images) ---------- */
.cs-flow {
	max-width: 30rem;
}

.cs-flow-title {
	font-family: var(--cs-mono);
	font-size: 0.68rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cs-muted);
	margin-bottom: 0.9rem;
}

.cs-flow ol {
	margin: 0;
	padding: 0;
	list-style: none;
	counter-reset: flow;
}

.cs-flow li {
	counter-increment: flow;
	position: relative;
	display: grid;
	grid-template-columns: 1.6rem 1.4rem minmax(0, 1fr);
	align-items: center;
	gap: 0.6rem;
	padding: 0.9rem 1rem;
	background: var(--cs-raised);
	border: 1px solid var(--cs-line);
	border-radius: var(--cs-radius);
	font-size: 0.98rem;
	line-height: 1.4;
	color: var(--cs-ink);
}

.cs-flow li::before {
	content: "0" counter(flow);
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	letter-spacing: 0.1em;
	color: var(--cs-muted);
}

.cs-flow li i {
	font-size: 0.95rem;
	text-align: center;
	color: var(--cs-ink);
}

/* connector between steps */
.cs-flow li + li {
	margin-top: 1.1rem;
}

.cs-flow li + li::after {
	content: "";
	position: absolute;
	left: 1.75rem;
	top: calc(-1.1rem - 1px);
	width: 1px;
	height: 1.1rem;
	background: var(--cs-line);
}

/* the outcome step: ink border, same surface as the rest */
.cs-flow li.is-done {
	border-color: var(--cs-ink);
	font-weight: 600;
}

/* ---------- Annotated screenshot: numbered pins + legend ---------- */
.cs-annotated-frame {
	position: relative;
}

.cs-pin {
	position: absolute;
	width: 1.5rem;
	height: 1.5rem;
	display: grid;
	place-items: center;
	transform: translate(-50%, -50%);
	font-family: var(--cs-mono);
	font-size: 0.7rem;
	font-weight: 600;
	line-height: 1;
	color: #fff;
	background: #1d1d1a;
	border: 2px solid #fff;
	border-radius: 50%;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.cs-pin-legend {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.9rem 2rem;
	margin: 1.25rem 0 0;
	padding: 0;
	list-style: none;
	counter-reset: pin;
}

.cs-pin-legend li {
	counter-increment: pin;
	position: relative;
	padding-left: 2.1rem;
	font-size: 0.9rem;
	line-height: 1.5;
	color: var(--cs-muted);
}

.cs-pin-legend li::before {
	content: counter(pin);
	position: absolute;
	left: 0;
	top: 0.1rem;
	width: 1.4rem;
	height: 1.4rem;
	display: grid;
	place-items: center;
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-weight: 600;
	color: var(--cs-bg);
	background: var(--cs-ink);
	border-radius: 50%;
}

@media (max-width: 767.98px) {
	.cs-pin {
		width: 1.1rem;
		height: 1.1rem;
		font-size: 0.55rem;
		border-width: 1px;
	}

	.cs-pin-legend {
		grid-template-columns: minmax(0, 1fr);
	}
}

/* ---------- Accordion with full titles (FAQ style) ---------- */
.cs-accordion {
	margin: 1.5rem 0;
	border-top: 1px solid var(--cs-line);
}

.cs-accordion .case-details {
	margin: 0;
	border-top: none;
}

.case-study .case-details--title > summary {
	font-family: var(--cs-sans);
	font-size: 1.05rem;
	font-weight: 600;
	letter-spacing: 0;
	text-transform: none;
	padding: 1.1rem 0;
}

.case-study .case-details--title > summary i {
	width: 1.6em;
	font-size: 0.85em;
	color: var(--cs-muted);
}

/* chevron instead of the plus sign */
.case-study .case-details--title > summary::after {
	content: "";
	flex: none;
	width: 0.55rem;
	height: 0.55rem;
	margin-right: 0.35rem;
	border-right: 1.5px solid var(--cs-ink);
	border-bottom: 1.5px solid var(--cs-ink);
	transform: translateY(-25%) rotate(45deg);
	transition: transform 0.25s ease;
}

.case-study .case-details--title[open] > summary::after {
	transform: translateY(25%) rotate(-135deg);
}

.case-details--title .case-details-body {
	padding-bottom: 1.5rem;
}

.case-details--title .cs-pair {
	margin-top: 0;
}

/* ---------- Tabs (js/case-study.js builds the tab list) ---------- */
.cs-tabs {
	margin: 1.5rem 0;
}

.cs-tablist {
	display: inline-flex;
	max-width: 100%;
	margin-bottom: 1.25rem;
	padding: 3px;
	gap: 3px;
	background: var(--cs-surface);
	border: 1px solid var(--cs-line);
	border-radius: 6px;
	overflow-x: auto;
	scrollbar-width: none;
}

.cs-tablist::-webkit-scrollbar {
	display: none;
}

.cs-tab {
	flex: none;
	margin: 0;
	padding: 0.5rem 0.9rem;
	background: none;
	border: 1px solid transparent;
	border-radius: 4px;
	font-family: var(--cs-mono);
	font-size: 0.68rem;
	font-weight: 500;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--cs-muted);
	cursor: pointer;
	transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.cs-tab:hover {
	background: none;
	color: var(--cs-ink);
}

.cs-tab[aria-selected="true"] {
	color: var(--cs-ink);
	background: var(--cs-bg);
	border-color: var(--cs-line);
}

.cs-tab:focus-visible {
	outline: 2px solid var(--cs-accent);
	outline-offset: 2px;
}

.cs-tabpanel > :first-child {
	margin-top: 0;
}

.cs-tabpanel > :last-child {
	margin-bottom: 0;
}

.cs-tabpanel h3 i {
	width: 1.5em;
	font-size: 0.85em;
	color: var(--cs-muted);
}

.cs-tabpanel .cs-pair {
	margin-top: 1rem;
}

/* no JS: panels stack, separated like sections */
.cs-tabs:not(.is-ready) .cs-tabpanel + .cs-tabpanel {
	margin-top: 2rem;
}

.cs-tabs.is-ready .cs-tabpanel:not([hidden]) {
	animation: cs-open 0.3s ease both;
}

@media (prefers-reduced-motion: reduce) {
	.cs-tabs.is-ready .cs-tabpanel:not([hidden]) {
		animation: none;
	}
}

/* ---------- Dev feed, related ---------- */
.case-study .bsky-sidebar-box {
	border-color: var(--cs-line);
	border-radius: 6px;
	margin-top: 2.5rem;
}

.case-study .bsky-sidebar-header {
	background: var(--cs-surface);
	border-bottom-color: var(--cs-line);
}

.case-study .bsky-sidebar-label {
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-weight: 500;
	letter-spacing: 0.14em;
	color: var(--cs-ink);
}

.case-study .related-articles-section {
	border-top-color: var(--cs-line);
}

.case-study .related-articles-section h2 {
	font-size: 1.7rem;
	font-weight: 400;
	max-width: none;
}

/* ---------- Motion ---------- */
.cs-js .cs-reveal {
	opacity: 0;
	transform: translateY(14px);
	transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
	transition-delay: var(--cs-delay, 0s);
}

.cs-js .cs-reveal.is-in {
	opacity: 1;
	transform: none;
}

@media (prefers-reduced-motion: reduce) {
	.cs-js .cs-reveal {
		opacity: 1;
		transform: none;
		transition: none;
	}

	.case-study h1,
	.case-study .case-details[open] > .case-details-body {
		animation: none;
		opacity: 1;
		transform: none;
	}

	.cs-progress {
		display: none;
	}
}

/* ---------- Small screens ---------- */
@media (max-width: 767.98px) {
	.cs-hero {
		padding-top: 2rem;
	}

	.cs-section {
		padding-top: 3.25rem;
	}

	.cs-meta,
	.cs-stats {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}

	.cs-meta > div:nth-child(n + 3) {
		border-top: 1px solid var(--cs-line);
	}

	.cs-stat {
		padding: 1.1rem 1rem 1rem 0;
	}

	.cs-stat:nth-child(odd) {
		padding-left: 0;
		border-left: none;
	}

	.cs-stat:nth-child(even) {
		padding-left: 1rem;
	}

	.cs-stat:nth-child(n + 3) {
		border-top: 1px solid var(--cs-line);
	}

	.cs-row,
	.cs-pair,
	.cs-ba-row {
		grid-template-columns: minmax(0, 1fr);
	}

	.cs-pair > div + div {
		margin-top: 1.1rem;
		border-top: 1px solid var(--cs-line);
	}

	.cs-tier {
		grid-template-columns: minmax(0, 1fr) auto;
	}

	.cs-tier .cs-badge {
		grid-column: 1 / -1;
		justify-self: start;
		margin-bottom: 0.35rem;
	}

	.cs-tier p {
		grid-column: 1 / -1;
	}

	.cs-ba-head {
		display: none;
	}

	.cs-ba-row [data-label]::before {
		display: block;
	}
}

/* ---------- Screen rows (several UI shots side by side) ---------- */
.cs-shots {
	display: grid;
	grid-template-columns: repeat(var(--cs-shots, 3), 1fr);
	gap: 1rem;
	align-items: start;
	margin: 1.75rem 0;
}

.cs-shots .cs-figure {
	margin: 0;
}

.cs-shots .cs-figure img {
	background: #fff;
}

.cs-shots--phones {
	max-width: 46rem;
	margin-inline: auto;
}

.cs-shots--phones .cs-figure img {
	border-radius: 14px;
}

.cs-shots-note {
	margin-top: 1.25rem;
	font-size: 0.85rem;
	color: var(--cs-muted);
}

@media (max-width: 575px) {
	.cs-shots:not(.cs-shots--phones) {
		grid-template-columns: 1fr;
	}

	.cs-shots--phones {
		gap: 0.5rem;
	}
}